Hello Loverboy,
the scanner turns on automatically as he he receives power from the host interface.
Please check the cables and connection.
For RS232 interface would you need an external power supply.
USB can power the scanner without external power supply.
By Keyboard Wedge installation please connnect also the Keyboard.

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Open a dos command window and see what data is inserted there. It should show the barcode and either step to the next line (If Enter is inserted by the scanner). If you are not getting anything in the dos window is it actually a USB scanner ?

Hi Christian, if your scanner was manufactured before February 2010 it may not be able to communicate directly with 123Scan2 so you wont be able to upgrade firmware with the program, but you will still be able to use it to create configuration sheets. These are the only two uses for 123Scan2.

To create a configuration sheet without "finding" the scanner click Create New Configuration then choose My scanner is NOT connected. Select the LS2208 and click on the blue firmware button to get into the configuration. When you have completed your configuration click the Print bar codes selection at the top of the window and when the file comes up be sure to click on the Bar code formatting menu and change the Bar code type to 1D One setting per barcode if it is not already there. Older scanners will not work with concatenated 1D barcodes where 123Scan2 puts more than one setting into a barcode.

The LS2208 is a universal scanner with many supported interfaces. Please check the ATS if one of the interfaces are available. See the list below:
RS-232
IBM 468X/469X
Keyboard Wedge
Wand Emulation
Undecoded Scanner Emulation
USB
Synapse Adapter

You will need to scan the barcode that configures the LS scanner to use keyboard wedge or even the set all defaults barcode. You will be able to find both of this on the product reference guide that you can download from www.symbol.com in the support page.

Check that the wedge is good. It is basically a hybrid spltter that powers both the scanner and the keyboard.
USB keyboard?
If so, you may want to go direct to either a serial port or a USB direct connection

you have to change it to IBM handheld mode and install opos drivers from symbol. then use pos.net to connect to them.Some computers requires to create some config files to connect through hardware address. It took me like 6 month to figure out but now it works

Just because it has a DB9 does not mean it is a direct connection. Many Bar code scanners have the DB9 connecting to a interface box and the interface box connects to the PC. If it is really a rs-232 scanner then you need to configure your serial port to the proper settings specified by symbol. But I am confident that this unit is missing the interface box.